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Finding the Fourth Proportional to 242.45, 363.91 and 215.27

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Solution

The fourth proportional to 242.45, 363.91 and 215.27 is: 323.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.45 : 363.91 = 215.27 : x
  2. Step 2: Convert to fraction form
    242.45/363.91 = 215.27/x
  3. Step 3: Cross multiply
    242.45x = 363.91 × 215.27
  4. Step 4: Simplify right side
    242.45x = 78,338.91
  5. Step 5: Solve for x
    x = 78,338.91/242.45
  6. Step 6: Final answer
    x = 323.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.